我喜欢 \paragraph{...} 命令，但如果我在 \begin{proof} 之后立即使用它，它不起作用。
有没有办法定义我自己的段落命令，以便我可以在 \begin{proof} 之后立即使用它。
\documentclass[a4paper,fontsize=12pt,egregdoesnotlikesansseriftitles]{scrartcl}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
\usepackage{fix-cm}
\usepackage[a4paper,left=3cm,right=3cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage[inline]{enumitem}
\setlength{\parindent}{0ex}
\setlength{\parskip}{1ex}
\setlength{\jot}{12pt}
\usepackage[onehalfspacing]{setspace}
\newtheoremstyle{my_theorem_style}
{20pt}{20pt}%
{\itshape}{}%
{\bfseries}{.}%
{\newline}{}%
\theoremstyle{my_theorem_style}
\newtheorem{theorem}{Theorem}[section]
\begin{document}
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Pretium vulputate sapien nec sagittis aliquam malesuada bibendum.
\begin{theorem}
Aliquam ultrices sagittis orci a scelerisque purus semper eget. Eget sit amet tellus cras adipiscing enim eu turpis egestas:
%
\begin{enumerate}
\item Nunc vel risus commodo.
\item Libero nunc consequat.
\item Diam maecenas sed enim ut.
\end{enumerate}
%
\end{theorem}
\begin{proof}...
%
\paragraph{ad 1.} Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Pretium vulputate sapien nec sagittis aliquam malesuada bibendum.
\paragraph{ad 2.} Amet nulla facilisi morbi tempus iaculis urna id volutpat. Adipiscing elit duis tristique sollicitudin nibh sit. Aliquam ultrices sagittis orci a scelerisque purus semper eget.
\paragraph{ad 3.} Habitasse platea dictumst vestibulum rhoncus est pellentesque elit ullamcorper. Libero nunc consequat interdum varius sit amet mattis. Fermentum leo vel orci porta non.
%
\end{proof}
\end{document}
如果我在 \begin{proof} 之后立即使用 \paragraph{...}，它甚至不会编译。
所以我总是要在 \begin{proof} 之后写一些东西（有时是 bs）。
答案1
我认为下面定义的宏mypara可以满足您的要求。它提供了\paragraph输出，但没有编号或目录条目。
% paraprob.tex SE 620506
\documentclass[a4paper,fontsize=12pt,egregdoesnotlikesansseriftitles]{scrartcl}
\usepackage[english]{babel}
\usepackage[T1]{fontenc}
\usepackage{fix-cm}
\usepackage[a4paper,left=3cm,right=3cm,top=2.5cm,bottom=2.5cm]{geometry}
\usepackage{amsthm}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage[inline]{enumitem}
\setlength{\parindent}{0ex}
\setlength{\parskip}{1ex}
\setlength{\jot}{12pt}
\usepackage[onehalfspacing]{setspace}
\newtheoremstyle{my_theorem_style}
{20pt}{20pt}%
{\itshape}{}%
{\bfseries}{.}%
{\newline}{}%
\theoremstyle{my_theorem_style}
\newtheorem{theorem}{Theorem}[section]
\newcommand{\mypara}[1]{%
\vspace{\parskip}
\vspace{\baselineskip}
\textbf{#1 }%
}
\begin{document}
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Pretium vulputate sapien nec sagittis aliquam malesuada bibendum.
\begin{theorem}
Aliquam ultrices sagittis orci a scelerisque purus semper eget. Eget sit amet tellus cras adipiscing enim eu turpis egestas:
%
\begin{enumerate}
\item Nunc vel risus commodo.
\item Libero nunc consequat.
\item Diam maecenas sed enim ut.
\end{enumerate}
%
\end{theorem}
\begin{proof}...
%
\paragraph{ad 1.} Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Pretium vulputate sapien nec sagittis aliquam malesuada bibendum.
\paragraph{ad 2.} Amet nulla facilisi morbi tempus iaculis urna id volutpat. Adipiscing elit duis tristique sollicitudin nibh sit. Aliquam ultrices sagittis orci a scelerisque purus semper eget.
\paragraph{ad 3.} Habitasse platea dictumst vestibulum rhoncus est pellentesque elit ullamcorper. Libero nunc consequat interdum varius sit amet mattis. Fermentum leo vel orci porta non.
%
\end{proof}
\begin{proof}...
\mypara{ad 1.} Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Pretium vulputate sapien nec sagittis aliquam malesuada bibendum.
\mypara{ad 2.} Amet nulla facilisi morbi tempus iaculis urna id volutpat. Adipiscing elit duis tristique sollicitudin nibh sit. Aliquam ultrices sagittis orci a scelerisque purus semper eget.
\mypara{ad 3.} Habitasse platea dictumst vestibulum rhoncus est pellentesque elit ullamcorper. Libero nunc consequat interdum varius sit amet mattis. Fermentum leo vel orci porta non.
%
\end{proof}
\end{document}
答案2
有点菜鸟的回答：但我发现放入一个
$\;$\\
通常会有所帮助。
这会给你一个数学环境，并在后面有一个换行符的空间中显示广告。
基本上是一个空行，没有使用不能立即工作的命令。